Hermes Fixes Session Isolation and Gateway Readiness in Latest Update

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Hermes has shipped four commits aimed at improving reliability in multi-session environments. The gateway now verifies live runtime state with authentication before signaling readiness, preventing clients from connecting to a partially initialized instance. A related fix ensures startup notifications are triggered correctly on cold starts. Additionally, two separate fixes in the TUI and desktop app now keep model picker selections scoped to individual sessions, stopping changes in one session from affecting others. These updates are particularly relevant for users running multiple agent sessions with different models simultaneously.

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